summaryrefslogtreecommitdiffstats
path: root/drivers/phy/tegra
diff options
context:
space:
mode:
authorWayne Chang <waynec@nvidia.com>2024-03-07 11:03:27 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-03-07 20:58:33 +0000
commitd843f031d9e90462253015bc0bd9e3852d206bf2 (patch)
treedcab3efc4aa0b35ba93b0775778b9a57fdc7aa44 /drivers/phy/tegra
parent07cb1ec0b13d4e100d01f47876795752cbc6f1cc (diff)
downloadlinux-stable-d843f031d9e90462253015bc0bd9e3852d206bf2.tar.gz
linux-stable-d843f031d9e90462253015bc0bd9e3852d206bf2.tar.bz2
linux-stable-d843f031d9e90462253015bc0bd9e3852d206bf2.zip
phy: tegra: xusb: Add API to retrieve the port number of phy
This patch introduces a new API, tegra_xusb_padctl_get_port_number, to the Tegra XUSB Pad Controller driver. This API is used to identify the USB port that is associated with a given PHY. The function takes a PHY pointer for either a USB2 PHY or USB3 PHY as input and returns the corresponding port number. If the PHY pointer is invalid, it returns -ENODEV. Cc: stable@vger.kernel.org Signed-off-by: Wayne Chang <waynec@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Link: https://lore.kernel.org/r/20240307030328.1487748-2-waynec@nvidia.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/phy/tegra')
-rw-r--r--drivers/phy/tegra/xusb.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 142ebe0247cc..983a6e6173bd 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -1531,6 +1531,19 @@ int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
+int tegra_xusb_padctl_get_port_number(struct phy *phy)
+{
+ struct tegra_xusb_lane *lane;
+
+ if (!phy)
+ return -ENODEV;
+
+ lane = phy_get_drvdata(phy);
+
+ return lane->index;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_port_number);
+
MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
MODULE_LICENSE("GPL v2");